package org.zjt.rpc.netty.client;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.protobuf.ProtobufDecoder;
import io.netty.handler.codec.protobuf.ProtobufEncoder;
import io.netty.handler.codec.protobuf.ProtobufVarint32FrameDecoder;
import io.netty.handler.codec.protobuf.ProtobufVarint32LengthFieldPrepender;
import org.zjt.rpc.domain.RpcMsgProto;

/**
 * Created by zhangjuntao on 2017/3/16.
 */
public class NettyClient {

    public void connect(int port, String host) throws Exception {
        // 配置客户端NIO线程组
        EventLoopGroup group = new NioEventLoopGroup();
        try {
            Bootstrap b = new Bootstrap();
            b.group(group).channel(NioSocketChannel.class)
                    .option(ChannelOption.TCP_NODELAY, true)
                    .handler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        public void initChannel(SocketChannel ch) throws Exception {

                            //添加通道处理
                            ch.pipeline().addLast(new ProtobufVarint32FrameDecoder());   //设置protobuf粘包、拆包的解码器
                            ch.pipeline().addLast(new ProtobufDecoder(RpcMsgProto.msg.getDefaultInstance()));   //protobuf解码器
                            ch.pipeline().addLast(new ProtobufVarint32LengthFieldPrepender());		//设置protobuf粘包、拆包编码器
                            ch.pipeline().addLast(new ProtobufEncoder());							//设置protobuf类的序列化编码器
                            ch.pipeline().addLast(new RpcClientHandler());

                        }
                    });

            // 发起异步连接操作
            ChannelFuture f = b.connect(host, port).sync();

            f.channel().write("main 方法中发送消息");


            // 当代客户端链路关闭
            f.channel().closeFuture().sync();
        } finally {
            // 优雅退出，释放NIO线程组
            group.shutdownGracefully();
        }
    }

    public static void main(String[] args)throws Exception{
        int port = 8070;
        if (args != null && args.length > 0) {
            try {
                port = Integer.valueOf(args[0]);
            } catch (NumberFormatException e) {
                // 采用默认值
            }
        }
        new NettyClient().connect(port, "127.0.0.1");
    }
}




